Obermiller Nelson Engineering Share: Engineering Obermiller Nelson Engineering Visit Website 233 W Rosser Ave Bismarck, ND 58501 (701) 222-0520 About Map About Obermiller Nelson Engineering, Inc. delivers success to our clients by providing professional, detailed mechanical, electrical and civil design and coordination of building systems. What's Nearby? Distance: 5 10 15 20 25 50 mi.